Method of chemically extinguishing fire.



J. A. THOMAS.

METHOD OF CHEMICALLY EXTINGUISHING FIRE.

v APPLICATION FILED FEB. 11, 1910. 1,16%681 Patented Dec. 21, 1915.

J \D m I 5 1 5 Z 5 (n E N & v1

TANK

anus W600 mm M Wfimmw COLUMBIA PLANOORAPH c0.. WAsmNuToN, n. c.

to the stream, may be varied at will.

lh lli l@lll,

JOHN A. THOMAS, OF ZANE-SVILLE, OHIO.

METHOD OF CHEMICALLY EXTINGUISI-IING FIRE.

Application filed February 11, 1910.

To all whom it may concern.

Be it known that I, JOHN A. THOMAS, a citizen of the United States,residing at Zanesville, in the county of Muskingum and State of Ohio,have invented certain new and useful Improvements in Methods ofillustrated one form of apparatus that may be employed in carrying outthe invention, though it is to be understood that the result so i'ht maybe obtained in many mechanical wa i.

Referring to the drawing, the numeral 5 designates a water supply pipewhich may be a city water supply pipe from a fire plug or may be a pipeconnected to the outlet of a lire engine or other source of water underpressure. This pipe leads to a water motor casing 6. The discharge pipe7 from the casing 6 conducts the water to the hire to be extinguished.The particular form of motor that is employed, is immaterial in so faras the method is concerned. The motor 6 actuates a pump 8, this pumplikewise being of any desired form.

The suction 9 of the pump leads to a tank 10 designed to contain anyconcentrated solution and fire extinguishing chemical agent, which whenmixed in a predetermined proportion with the water which passes throughthe discharge 7, chemicalizes the Whole stream. The discharge line 11 ofthe pump,

leads from the pump to the main discharge 4. A valve 12 is located inthe suction line 9 of the pump 8 and by means of this valve. thequantity of chemical solution delivered If desired, a separate watersupply pipe 14 may be employed to conduct Water from the Water supplypipe 5 to the tank 10. This pipe 14 has a valve 15 therein forcontrolling the flow of water ,therethrough. The pur- Specification ofLetters Patent.

Patented Dec. 21, 1915.

Serial No. 543,360.

pose of the pipe 14: is to conduct water to the tank when preparing theconcentrated solution of chemical agents.

It will therefore be seen that the present invention as a method, has atwo-fold objcct, first, to deliver into a stream of water under pressurea predeterminedquantity oi' lire extinguishing chemical by means ofwhich the entire stream is chemicalized, the amount of chemical thusdelivered to the stream being in a predetermined proportion and relationto the amount of water discharged, and second, to deliver to the streamof water a chemical such as bicarbonate of soda, from which the carbonicgas is released only after the stream reaches the fire, the carbonic gasbeing released by the heat. This is an important departure from methodswherein the carbonic acid gas is released prior to the time that thestream reaches the fire, for during its transit much of its lireextinguishing power is lost.

it is apparent that with elements such. as herein shown and describedmounted upon a Wheeled lire apparatus, that many hundreds of gallons ofwater from a city water supply may be chemicalized by means of theconcentrated solution carried in the tank 10. FUF'ClIGI'HIOlG a tank ofthis character may be installed in a building and by merely turning onthe water supply, many hundreds of gallons of chemicalized water may behad for tile extinguishing of fire.

lV hat I claim, is-

A method of extinguishing fire with a chemically impregnated streamunder pressure which consists first in segregating and shunting aportion of said stream through a chemical container, and subsequentlydrawing the resultant solution from said container by suction. andpositively forcing said solution into said stream by a pump driven bythe main line stream under pres sure.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN A. THUMAS. Witnesses 2 C. L. Simon, STANLEY J. CREW.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

